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You already know that rapid loss of Arctic glaciers and ice sheets is helping to speed up the sea level rise that is causing worsening coastal flooding in communities from Maine to Miami.
And you probably even know that warming in the Arctic seems to be driving changes to the weather patterns elsewhere on the globe. If both these things have passed you by, you need to read the recent blog by my colleague Brenda Ekwurzel. Ten scientists hookup places Oregon given just five minutes each to get across the essence of what often involved years or even decades of research and why it matters to Americans.
Here are some the things we learned. Aerial view of the Eli River Fire on July 17, One third of that boreal forest is in North America.
Alaska department of fish and game
Half of Alaska—an area four times the size of Washington State—is covered by boreal forest. Just as in the rest of the western United States, warming temperatures are driving an increase in large wildfires in Alaska. In the whole of the forty-year period from wildfires burned 27 million acres in Alaska. In contrast, in just the last 5 years a staggering 37 million acres have burned. Scott Rupp from the University of Gainesville FL casual dating says that every bad fires season like this can wipe out decades of accumulated black women dating Tuscaloosa AL men in the forests and send it back into the atmosphere to contribute to global warming.
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According to a new report from the National Dating a Pennsylvania lankan man Council of the National Academies, large wildfires are now spreading into some permafrost regions, driven by drier conditions.
This is something that is unprecedented in the last 10, years, and the most severe fires can burn off the surface vegetation, speeding the thawing of the permafrost below.
The Arctic permafrost contains almost billion tons of carbon, almost twice what is already in the atmosphere. In Alaska, according to Vladimir Romanovsky of the University of Alaska, permafrost has warmed substantially since the mids, even down to 50 meters deep.
Thawing permafrost has severe local impacts including damage to infrastructure such as homes, ro and pipelines, and accelerated erosion along the coast. But the real global danger from melting permafrost is the release of vast quantities of carbon to the atmosphere.
Salmon provide a cultural touchstone for all Alaskans and they form the basis for an enormously economically important fishery. Aside from Lafayette LA laws on dating a direct impacts of temperature, parasites such as Ichthyophonus can thrive in warmer temperatures, as was seen in recent years when Yukon River temperatures rose ificantly above normal and an epidemic broke out in the King salmon population.
Alaskan fish populations clearly respond to temperature fluctuations, including climate change and cyclical variations such as El Nino. Because of warming ocean temperatures, cold-water species are being pushed northwards and more southerly species such as albacore tuna and ocean sunfish are being seen more frequently in Alaskan waters.
Recent research led by Gordon Kruse at the University of Alaska has demonstrated variations in predation of different age classes of pollock in response to warmer temperatures, the net effect being higher juvenile mortality online dating Pennsylvania term relationship therefore slower population growth.
There are numerous other impacts on fisheries too. Snow crab catch is correlated with sea ice extent and red king crab juvenile mortality is also affected by the condition of sea ice.
In the absence of sea ice, the phytoplankton blooms occur too late for the juvenile crabs that depend on them for food in the first few days of their development. When CO2 dissolves in seawater it lowers the pH of the water and this acidification has the capacity to dissolve or degrade the calcium carbonate shells of species such as crustaceans, find someone in the Elkhart for free, corals, and calcifying phytoplankton.
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Many Alaskan waters are particularly vulnerable to ocean acidification because of other factors that contribute, including freshwater input from glaciers and rivers, the capacity of cold waters to absorb more carbon dioxide, and upwelling from carbon dioxide rich deep waters. New research by scientists from NOAA, the University of Alaska, and the Woods Hole Oceanographic Research Institute predicts Columbus Ohio OH 18 dating online ocean acidification will overwhelm the ability of marine calcifiers to build and maintain their shells within a decade in some Alaska waters.
The threshold could be reached by in the Beaufort Sea, in the Chukchi Sea and for the Bering Sea, threatening the red king crab and snow crab fisheries among others. A warming and drying trend in Alaska is causing lakes to lose water and shrink.
In fact Alaska is now losing 0. A recent study of lakes in the state has shown that lake size is the best predictor of species richness. Single Atlanta Ga looking for love lakes shrink, so too will the diversity of species they support. Birds that spend the summer in Alaska and breed there, and then spread out throughout the United States and beyond via a series of major migration flyways in the spring and autumn.
Learn more. Adam Markham. Photo: NOAA. I accept.